package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author xmy
 * @version 1.0
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private DishMapper dishMapper;
    /*
    新增菜品及其口味
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        //像菜品表插入1条数据

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());//动态拼接sql，（limited 0，10）
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        PageResult pageResult=new PageResult(page.getTotal(),page.getResult());
        return pageResult;
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--是否存在起售中的菜品

        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除--是否被套餐关联了
        List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除对应菜品得口味
        dishFlavorMapper.deleteBatch(ids);
        //删除菜品
        dishMapper.deleteBatch(ids);

    }

    @Override
    public void startOrStop(Integer status,Integer id) {
        dishMapper.updateStatus(status,id);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
       Dish dish=dishMapper.getById(id);
       List<DishFlavor> dishFlavorList=dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }

    /**
     * 修改菜品信息
     * @param dishDTO
     */
    @Override
    public void update(DishDTO dishDTO) {
        //修改菜品基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        List<Long> list=new ArrayList<>();
        list.add(dishDTO.getId());
        //删除原有口味
        dishFlavorMapper.deleteBatch(list);
        //插入口味

        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<DishVO> getByCategoryId(Long categoryId) {
        List<Dish> dishs=dishMapper.getByCategoryId(categoryId);
        List<DishVO> dishVOS=new ArrayList<>();
        for(Dish d:dishs){
            List<DishFlavor> dishFlavorList=dishFlavorMapper.getByDishId(d.getId());
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            dishVO.setFlavors(dishFlavorList);
            dishVOS.add(dishVO);
        }

        return dishVOS;
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
